Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual foi a maneira de saída do gerente anterior, Giuseppe Iachini?
 ###Tabelas: CREATE TABLE world_cup_top_twenty_finishes (world_cup_top_twenty_finishes_id AUTO_INCREMENT PRIMARY KEY, Season INT, Date VARCHAR, Location VARCHAR, Race VARCHAR, Place VARCHAR) CREATE TABLE managerial_changes (managerial_changes_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Outgoing manager VARCHAR, Manner of departure VARCHAR, Date of vacancy VARCHAR, Replaced by VARCHAR, Date of appointment VARCHAR) CREATE TABLE third_round_saturday (third_round_saturday_id AUTO_INCREMENT PRIMARY KEY, Place VARCHAR, Player VARCHAR, Country VARCHAR, Score VARCHAR, To par VARCHAR) CREATE TABLE table_of_dahlgren_boat_howitzers (table_of_dahlgren_boat_howitzers_id AUTO_INCREMENT PRIMARY KEY, Designation VARCHAR, Bore VARCHAR, Weight VARCHAR, Service Charge VARCHAR, Range (yards) VARCHAR, Number Made INT) CREATE TABLE main_transmitters (main_transmitters_id AUTO_INCREMENT PRIMARY KEY, Region served VARCHAR, City VARCHAR, Channels ( Analog / Digital ) VARCHAR, First air date VARCHAR, ERP (Analog/ Digital) VARCHAR, HAAT (Analog/ Digital) 1 VARCHAR, Transmitter Location VARCHAR)  
SELECT Manner of departure FROM managerial_changes WHERE Outgoing manager = giuseppe iachini